-- card: 60133 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 7720
-- name: #348
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on openCard
  global group,rightone
  put 33 into group
  put "A" into rightone
  pass openCard
end openCard



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Question #33

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4BH-1A.1 In a pulse-width modulation system, what parameter does the modulating signal vary?

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Pulse duration

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Pulse frequency 

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Pulse amplitude

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Pulse intensity

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Correct answer is A